So yesterday, i bought both omnibus books of the manga Girl Friends, and it instantly hit the spot as my number one favorite manga. It's the cutest and most adorably romantic manga I have ever read.

Sadly, the series isn't very long, and I have now finished reading both books. But I want more. MORE.
A series that portrays relationship in a realistic fashion that builds up gradually, and that isn't pandering.
I would like to hear if someone here has any suggestions on what that could be.
I want something sweet. Nudity is fine, so long as it's done tastefully.

No sappy melodrama, and no porn allowed. Not unless the story and characters are really good and can make up for it.
But it would be preferable with nothing explicit. Or at least not too much of it.

I have concidered some of the author of Girl Friends (Milk Morinaga) other works, but as far as I understand she typically does more pornographic material, which is not what I'm after.
It would be nice if someone had imput on her other works as well.